Police enraged by the kidnapping of six officers club unarmed detainees. A bloody battle between steelworkers and police leaves two miners dead. Drug lords post the heads of decapitated police on a fence to show who's in charge.

...

In April, suspected drug lords posted the heads of two police officers on a wall outside a government building where four drug traffickers died in a Jan. 27 shootout with officers in the Pacific resort of Acapulco.

A sign nearby read: "So that you learn to respect."

Just keep this in mind the next time you hear the numbers on how many illegal Mexicans make it into the United States. While most may be coming to work here, one of them could be somehow related to crimes like this.